Abstract

Bi2Se3 nanoribbons and nanowires were synthesized by Au-catalyzed and catalyst-free chemical vapor deposition methods. The growth of Au-catalyzed Bi2Se3 nanoribbons and nanowires is governed by the vapor-solid-solid mechanism, and the nanoribbons grow along &lt;1120&gt; and the nanowires grow along &lt;0001&gt; directions. Catalyst-free grown Bi2Se3 nanoribbons are found to have a growth direction of &lt;1120&gt; and their growth is induced by a Se-catalyzed vapor-liquid-solid mechanism.